The safety lapses have frustrated families of the victims.

In five others, safety lapses were a contributing factor.

The tunnel's operators maintained that neither the fire nor the investigation by The Observer revealed any basic safety lapses.

A number of safety lapses caused the collapse:

Keith Lindner attributes the labor problems and allegations of safety lapses to former management.

First, they would pursue the safety lapses with the AEC.

Is his greatest concern carelessness or some other onboard safety lapse that could endanger the passengers and crew?

Following the disaster, we are discovering serious safety lapses in the chemical industry in other parts of the country.

But some critics warned that the episode constituted a serious safety lapse and pointed to a more widespread problem at other plants.

The Labor Department found major safety lapses in November and proposed a $4.2 million fine, which the company is appealing.